Exercise step platform



FIG. 1 is a top view of a exercise step platform of the present invention;

FIG. 2 is a bottom view of the exercise step platform of FIG. 1;

FIG. 3 is a side view of the exercise step platform of FIG. 1, the other side view being a mirror image thereof;

FIG. 4 is an end view of the exercise step platform of FIG. 1, the other end view being a mirror image thereof; and,

FIG. 5 is an isometric view of the exercise step platform of FIG. 1.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a exercise step platform, as shown and described. 